Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2/38—Joints for elbows or knees
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2/38—Joints for elbows or knees
  • A61F2/3836—Special connection between upper and lower leg, e.g. constrained
  • A61F2/3854—Special connection between upper and lower leg, e.g. constrained with ball and socket joint
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2/38—Joints for elbows or knees
  • A61F2/3886—Joints for elbows or knees for stabilising knees against anterior or lateral dislocations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
  • A61L27/14—Macromolecular materials
  • A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
  • A61F2/4684—Trial or dummy prostheses
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
  • A61F2002/30108—Shapes
  • A61F2002/30199—Three-dimensional shapes
  • A61F2002/30301—Three-dimensional shapes saddle-shaped
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
  • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
  • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
  • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
  • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
  • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
  • A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
  • A61F2002/30387—Dovetail connection
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
  • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
  • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
  • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
  • A61F2002/305—Snap connection
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
  • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
  • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
  • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
  • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
  • A61F2002/30884—Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
  • A61F2002/30934—Special articulating surfaces

Definitions

• the present invention relates generally to a knee resurfacing prosthesis and more specifically it relates to a knee implant prosthesis for knee resurfacing.
• knee-resurfacing prostheses have been in use for years to treat articulating surfaces destroyed by arthritis or pathological processes secondary to trauma.
• the natural knee joint comprises an upper femoral articulating surface having two condylar surfaces and a lower tibial plateau comprising two cupule shaped tibial condyles
• knee articulating smoothly with the upper femoral condyles.
• knee Typically, knee
• replacement prostheses are comprised of several types of prostheses, where articulating components of the knee are removed and replaced with metal and polyethylene components.
• Prior art devices have attempted to duplicate the geometry of the natural articulating surface, where the femorai component has a semicircular C shaped design such as depicted in a U.S. Pat. No. 4,224,898.
• the bicondylar design is similarly disciosed in prior patents by F. Bueche! and Pappas in U.S. Pat. Nos. 4,309,778 and 4,470, 158.
• a more recent bicondylar design is described in U.S. Pat No. D473.307S and U.S. Patent No. 6,197,064 B1.
• the prior art describes the bicondylar prosthesis as having a middle patellar groove for the femoral patellar articulation.
• Other knee implant devices are used to resurface only one femoral condyle such as unicondyiar prostheses described in U.S. Pat. No. 7, 141 ,053 and U.S. Pat No. 6,726,724.
• Multiple designs of hinged implants also have been described basically for use in revision procedures and cases where bone loss and instability precluded the use of conventional implants.
• the design of the present invention is not a hinge. And, unlike hinged designs, my design allows the two articulating surfaces of the tibia and the femur to separate slightly in extreme ranges of motion such as squatting or during running.
• the reverse knee resurfacing prosthesis according to the present invention substantially departs from the conventional concepts and designs of the prior art, and in so doing provides an apparatus primarily developed for the purpose of resurfacing the articulating surfaces of the femur and the tibia using a reverse geometry where the femoral component has the shape of a cupule and the preferred embodiment of the tibial
• the reversed geometry provides significant advantages, both mechanical and anatomical, over previously known knee implants.
• the mechanical advantage being a significant increase in the contact surface between the tibia and the femur thereby reducing pressure forces and consequently reducing wear.
• the curved femoral implant surface contacts the fiat tibial articulating surface with a very small surface area and, as a result, the pressure load can exceed three to four times the body weight.
• This stress concentration increases wear of the polyethylene tibial tray and reduces the efficacy and life of the implant.
• the contact surface encompasses the concave surface of the femoral cup, thereby distributing the pressure load over a large surface and minimizing wear.
• the anatomical advantage lies in the fact that my reverse geometry and anterior lip feature eliminates the need for cruciate ligaments.
• the shape of my femoral cup provides considerable stability in the anterior-posterior plane and prevents the femur from sliding forward. During the stance and swing phase of ambulation, the constraining geometry of the anterior and posterior lips of the femoral cup replace the mechanical effect of the anterior and posterior cruciate ligaments.
• the present invention provides a new reverse knee resurfacing prosthesis construction for use in knee resurfacing procedures.
• the prosthesis of the present invention provides increased ranges of motion and improved stability as well as a substantia! reduction of wear.
• Fig. 1 is a side cross sectional view of the prosthesis.
• Fig. 1A is a partial exploded section view illustrating in detail the polyethylene liner and the femoral cup of Fig. 1.
• FIG. 2 is a front elevation view of the implanted prosthesis, illustrating the femur and tibia in section wherein the femoral component is seated in the femur and tibial component is seated in the tibia.
• Figs. 2A and 2B are section views of two embodiments of the femoral stem and femoral cup of Fig. 2.
• Fig. 3 is a perspective view of the femoral cup.
• Fig. 4 is a frontal perspective view of the tibial component comprising a troch eal component and a tibial tray.
• Fig. 4A is a top view of the tibial tray of Fig. 4.
• Fig. 4B is a frontal elevation view of Fig. 4A.
• Fig. 4C is a section view taken along section line A ⁇ A of Fig,
• FIG. 4D is an elevation view of the trochlea! component of FIG.4 with an added section of a screw.
• Fig. 4E is a bottom view of Fig. 4D.
• Fig. 5 is a rear view of the tibial component revealing the trochlea! component and a posterior recess.
• Fig. 6 is a side elevation view of the prosthesis wherein the posterior lip s situated in the posterior recess, allowing excessive flexion.
• Fig. 7 is a section view of an alternative embodiment of the invention.
• the present invention generally comprises a femoral component having a stem 1 or 1A to be inserted in and affixed in the femur and a femoral cup 14.
• a lining 2 or 2A in the form of a shell is secured onto the concave surface of the femoral cup 14.
• the preferred lining is polyethylene but materials other than polyethylene can be used as the lining as is well known in the art.
• the lining comprises a ridge 20 oriented from the front to the back. The ridge 20 articulates in the central groove 21 of the trochleal component 3. It is secured to the cup by guide 18 and liner locking tabs 24.
• guide 18 is sized to fit in recess 26.
• Recess 26 has locking liner recesses 2? in the side walls thereof.
• lining locking tabs 24 are pressed toward the side walls of guide 18 and they snap open into locking lining recesses 27 when guide 18 is fui!y pressed into recess 28, thereby locking lining 2 into femora! cup 14.
• the femoral cup has a posterior lip 4 or 4A and an anterior Hp S.
• the anterior iip 5 must have a length longer than posterior lip 4 or 4A so thai cruciate ligaments are unnecessary.
• the trochleal component 3 has a transverse curved body with a narrowed waist 21. Said trochleal component 3 has a highly polished surface, which will allow articulation with the lined femora! cup.
• the trochleal component is attached to the tibial tray 19 or 19A by a neck 16. Posteriorly (Fig. 5), the neck 16 and trochleal component 3 provide a central posterior recess 23, which will receive the posterior lip 4 of the femoral cup during extreme flexion. (See Fig, 8.)
• tibial tray 19 is provided with stabilizing posts 22 which are implanted in the tibia.
• tibia! tray 19A is provided with a stabilizing fin 7 having a rib 7 A thereon which is implanted into the tibia.
• the tibia! tray 19 or 19 ⁇ can be further secured to the tibia using screws such as screw 31 illustrated in section in Fig. 4C.
• the trochleal component 3 is secured to the tibial tray 19 after the tibial tray is secured to the tibia. This is accomplished by sliding the trochlea!
• the tibial tray has a tray locking tab 17 which functions in the same manner as lining locking tabs 24.
• Figs 4A, B and C illustrate the tibial tray 19 of Fig. 4 in more detail.
• This embodiment of tibial tray 19 comprises stabilizing posts 22 slotted portion 8, posterior notch 2S and optional screw holes 30.
• Fig. 4C illustrates a flat head screw 31 in section in one of the optional screw holes 30.
• the tibial tray can be affixed to the tibia by various means known in the art such as screws, pins, cement or various combinations thereof.
• the construction of the tibial tray 19 of Fig. 4 is the same as the construction of the tibial tray 19A of Figs. 1 , 2, 5 and 8 with the difference being that tibial tray 19A comprises stabilizing fin 7 and tibial tray 19 comprises stabilizing posts 22.
• Fig. 4D is an elevation view of the trochlea! component 3 of Fig. 4.
• the troch!eal component 3 comprises central groove 21, neck 18 and Tab 32
• Fig, 4E is a bottom view of Fig. 4D.
• Trochlea! component 3 is affixed to tibia! tray 19 by sliding tab 32 into slot ⁇ and locking it in position as explained above.
• the tibial tray 19 comprises a semi-circular notch 2 ⁇ (Figs. 4A and 5) to allow extreme flexion.
• a kit containing the component parts of the knee replacement prosthesis of the present invention contains two or more trial plastic implants having different sizes and two or more prostheses of the invention having the same sizes as the trial plastic implants.
• the trial plastic implants each include a stem and femoral cup, a trochlea! component and a tibial component.
• Two or more permanent linings of different thicknesses are also included in the kit along with two or more trial plastic linings, each trial plastic lining has a thickness corresponding to a permanent lining thickness.
• a permanent lining, such as a polyethylene lining, of appropriate thickness is selected during surgery using the trial implants and linings to make the best fit of the prosthesis to the patient.
• the construction of the trial plastic lining is different from the permanent lining in that guide 18 does not contain locking tabs 24. This allows the surgeon to test trial plastic linings of different thicknesses in each trial plastic implant.
• the surgeon will first make an anterior midline incision. Then the patella is dislocated laterally and the knee is flexed.
• the femur then is prepared first by inserting an intramedullary guide rod and then making appropriate distal femoral cuts using cutting guides.
• the tibia then is prepared by making appropriate cuts using a cutting guide.
• a trial plastic implant is then temporarily implanted in the patient and the trial plastic linings are tested. Then the range of motion of the knee is checked for stability. When the stability is satisfactory, the trial plastic implant components are removed and replaced with a permanent prosthesis and lining having the same sizes as the trial implant and lining.
• the tibial tray is affixed in place followed by affixing the femoral stem in the femur by impacting.
• the lining is locked in place.
• the trochlea! component is affixed in the tibia! tray.
• the patella may or may not need to be resurfaced depending on the degree of damage to its articular surface.
• the tibia! and femoral components can be made of metal such as titanium or a metallic al!oy such as cobalt chrome. They can be also made of ceramic such as alumina or silicone nitride or the like, or other biocompatible materials having sufficient strength for the intended purpose.
• the trough 15 illustrated as in Fig. 2 is a space between the femur and the trochleal component 3. It can be made wider in order to allow some rotation of the trochlea vis a vis the femoral cup.
• tibial component having the shape of a trochlea
• it can have a curved surface without a groove in its middle portion and the concave surface of the femoral cup will be shaped compatibly with structure to prevent undesired lateral movement.
• This embodiment is illustrated in section in Fig. 7.
• Stem 1A is the same as stem 1 of Fig. 1 but femoral cup 14A is different from femoral cup 14 because femora! cup 14A has side portions which extend over the ends of trochleal component 3A to limit lateral movement of the femora! cup relative to the trochleal component.
• Neck 18A is essentially of the same
• Polyethylene liner 2B articulates on the top of trochleal componeni 3A and the side portions 34 of polyethylene liner 2B can articulate on the ends 33 troch!eal component 3A.

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• Health & Medical Sciences (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Transplantation (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• Veterinary Medicine (AREA)
• Public Health (AREA)
• General Health & Medical Sciences (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Heart & Thoracic Surgery (AREA)
• Physical Education & Sports Medicine (AREA)
• Vascular Medicine (AREA)
• Biomedical Technology (AREA)
• Engineering & Computer Science (AREA)
• Cardiology (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Dermatology (AREA)
• Medicinal Chemistry (AREA)
• Epidemiology (AREA)
• Prostheses (AREA)

Priority Applications (10)

Applications Claiming Priority (2)

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Citations (6)

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• 2014
  • 2014-09-25 TR TR2019/05582T patent/TR201905582T4/tr unknown
  • 2014-09-25 ES ES14847813T patent/ES2723354T3/es active Active
  • 2014-09-25 CN CN202010156167.2A patent/CN111281618A/zh active Pending
  • 2014-09-25 WO PCT/US2014/057433 patent/WO2015048273A1/en active Application Filing
  • 2014-09-25 CN CN201480053061.2A patent/CN105636554A/zh active Pending
  • 2014-09-25 JP JP2016515380A patent/JP6584389B2/ja active Active
  • 2014-09-25 US US15/024,369 patent/US9861485B2/en active Active
  • 2014-09-25 EP EP14847813.4A patent/EP3049027B1/en active Active
  • 2014-09-25 CA CA2924694A patent/CA2924694C/en active Active
  • 2014-09-25 BR BR112016006674-0A patent/BR112016006674B1/pt active IP Right Grant
  • 2014-09-25 KR KR1020167009291A patent/KR101891902B1/ko active IP Right Grant
• 2016
  • 2016-03-23 ZA ZA2016/01995A patent/ZA201601995B/en unknown
  • 2016-10-24 HK HK16112176.3A patent/HK1223812A1/zh unknown

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